"Donald Trump, with all due respect to my friend at 10, will go on Hannity, and pretty much only Hannity, and will not venture out to the unsafe spaces these days, which doesn't exactly expand the tent," Kelly had said.

"u should be mad at @HillaryClinton. Clearly you support her," Hannity tweeted at Kelly.

In fact, Kelly is a nonpartisan journalist, and she had criticized both Trump and Hillary Clinton for only speaking to sympathetic interviewers.

While Hannity alone is responsible for his attack on Kelly, the fact that their discord spilled into public view suggests a lack of order following the ouster of Roger Ailes, the former chairman and CEO who resigned amid sexual harassment allegations.

Ailes was able to manage such disparate talents, but since his departure in July the tension between Kelly and Hannity has grown increasingly apparent.